Adjustable primary coil assembly, adjustment method and wireless power transmitting device

Abstract

In order to solve the problem of underwater power supply for underwater equipment of different models, especially underwater power supply for underwater equipment with large volume differences, it is necessary to establish multiple underwater charging base stations to carry primary coils of different specifications, which leads to reduced utilization and increased maintenance costs of underwater charging base stations. The present invention proposes an adjustable primary coil assembly, adjustment method and wireless power transmitter. The adjustable primary coil assembly of the present invention includes a wire storage unit, a winding unit, a wire retracting unit, an oil charging and discharging assembly and a control module. The control module can control the operation of the oil charging and discharging assembly and the winding unit according to the specifications of the secondary coil carried on the underwater equipment, and wind the primary coil to match the secondary coil, forming a coupler adapted to the charging needs of underwater equipment of different models, realizing the function of carrying primary coils of different specifications on the same underwater charging base station, improving the utilization of the underwater charging base station, and reducing the maintenance cost of the underwater charging base station.

Description

Technical Field

[0001] The invention relates to the technical field of power supply circuit devices or systems. Background Art

[0002] Underwater equipment such as underwater vehicles and underwater submersibles have been applied to underwater exploration and many other fields due to their safety and intelligence. However, due to the limitations of their internal space and mass, underwater equipment generally has defects such as limited power, small cruising range, and difficulty in ensuring the continuity of underwater operations. Underwater wireless charging technology transfers energy through the electromagnetic field between coupling coils, which can conveniently supply underwater power to underwater equipment and improve its cruising range and underwater continuous operation capabilities.

[0003] like Figure 1-2 As shown, taking the charging of a certain type of underwater vehicle as an example, the underwater wireless charging device includes a primary coil 31, a primary circuit 32, a secondary coil 41 and a secondary circuit 42. The primary coil 31 is installed on the underwater charging base station 1, and the secondary coil 41 is installed on the belly of the underwater vehicle 2. The primary circuit 32 is arranged in the base station control cabin of the underwater charging base station 1 and connected to the primary coil 31. The secondary circuit 42 is arranged in the cabin of the underwater vehicle 2 and connected to the secondary coil 41. The primary coil 31 and the secondary coil 41 form a coupler; when the underwater vehicle 2 navigates to the top of the underwater charging base station 1 After the primary coil 31 is aligned with the secondary coil 41, the electric energy supplied by the underwater charging base station 1 is first reversed into high-frequency alternating current through the high-frequency inverter circuit in the primary circuit 32 and input into the primary coil 31. The primary coil 31 generates an alternating magnetic field under the action of the high-frequency alternating current. The alternating magnetic field links with the secondary coil 41 to excite induced electromotive force, and is converted into direct current through the rectifier in the secondary circuit 42. The direct current is converted into the voltage required for charging the battery pack of the vehicle through the battery charger, thereby supplying the electric energy output by the underwater charging base station 1 to the underwater vehicle 2 through the underwater wireless charging device.

[0004] Different types of underwater equipment may have different battery pack capacities according to their different volumes. When a large-capacity battery pack is supplied with underwater power, if a small-sized coupler is used in the underwater wireless charging device, it will not be able to provide sufficient mutual inductance, resulting in a slow charging speed. In addition, since the small-sized coupler cannot efficiently transmit power, more power is lost in the form of heat. When a small-capacity battery pack is supplied with underwater power, if a large-sized coupler is used in the underwater wireless charging device, the charging requirements of the coupler and the small-capacity battery pack will not match. Different charging strategies need to be configured to adapt to the small-capacity battery pack, resulting in the need for more complex control algorithms and charging management systems. Therefore, in order to improve the efficiency of power transmission, shorten the charging time, and simplify the control algorithm and charging management system, it is often necessary to equip different types of underwater equipment, especially underwater equipment with large volume differences, with couplers of different specifications, and then it is necessary to equip them with primary coils of different specifications. Correspondingly, multiple underwater charging base stations need to be established to carry these primary coils of different specifications, resulting in reduced utilization of underwater charging base stations and increased maintenance costs. Summary of the invention

[0005] In order to solve the technical problem that currently, to realize underwater power replenishment of underwater equipment of different types, especially to realize underwater power replenishment of underwater equipment with large size difference, it is necessary to establish multiple underwater charging base stations to carry primary coils of different specifications, which leads to reduced utilization rate and increased maintenance cost of underwater charging base stations, the present invention proposes an adjustable primary coil assembly, an adjustment method and a wireless power transmitting device.

[0006] The technical solution of the present invention is:

[0007] The adjustable primary coil assembly is special in that it includes a protective shell, a bottom cover, a wire storage unit, a wire, a wire retracting and releasing unit, a winding unit, an oil charging and discharging assembly, a control module and a ring-shaped ferrite core;

[0008] The protective shell and the bottom cover are connected up and down to form a closed cavity for accommodating and protecting the wire storage unit, the wire retracting and releasing unit, the winding unit and the ferrite core;

[0009] The wire storage unit is used for storing wires;

[0010] The upper end of the wire extends out of the wire storage unit and is connected to the winding unit, and the lower end of the wire is connected to the wire retracting and releasing unit;

[0011] The wire-retracting and -releasing unit is a spring-type wire-retracting and -releasing mechanism, which is used to assist the wire to be continuously drawn out from the wire storage unit to realize wire release when the upper end of the wire is pulled, and to pull the wire back into the wire storage unit to realize automatic wire retraction when the upper end of the wire is not pulled;

[0012] The winding unit includes a motor, a stud, a threaded connection column and an annular oil bag; the output shaft of the motor is axially connected to the lower end of the stud; the threaded connection column is sleeved in the annular oil bag and fixedly connected to it; the stud is sleeved in the threaded connection column and thread-matched with it; the upper part of the stud is supported on the protective housing through a bearing; the annular oil bag is made of elastic material, and an ear seat is provided on its outer wall; the upper end of the wire is connected to the ear seat; in the initial state, the annular oil bag is pre-set with heat-conducting insulating oil to balance the internal and external pressures;

[0013] The motor drives the stud to rotate, and the stud drives the threaded connection column to rotate and move up / down, thereby driving the annular oil bag to rotate and move up / down; when the annular oil bag rotates and moves up, the wire is pulled out of the wire storage unit and wound around the annular oil bag to form a primary coil; when the annular oil bag rotates and moves down, the wire is detached from the annular oil bag and recovered into the wire storage unit;

[0014] The oil filling and discharging assembly is used to fill the annular oil bag with heat-conducting insulating oil so that the diameter of the annular oil bag matches the diameter of the secondary coil, and to extract the heat-conducting insulating oil in the annular oil bag and return it for storage, so that the annular oil bag returns to its initial state;

[0015] The control module is used to control the winding unit and the oil charging and discharging assembly to work according to the structural parameters of the secondary coil, so as to ensure that the primary coil finally formed is compatible with the secondary coil;

[0016] The annular ferrite core is sleeved outside the stud and located between the annular oil bag and the motor, and is used to concentrate the magnetic field inside the primary coil, reduce leakage magnetic loss, and enhance the magnetic permeability of the magnetic circuit.

[0017] Furthermore, the wire storage unit includes a hollow cone that is larger at the top and smaller at the bottom and is fixed in a protective shell. The internal cavity of the hollow cone is used to accommodate the winding unit. A conical spiral wire groove is processed on the outer surface of the hollow cone. A wire hole for connecting the wire groove with the internal cavity of the hollow cone is processed on the upper part of the hollow cone. The wire is installed and limited in the wire groove. After the upper end of the wire is led out from the wire hole to the internal cavity area of ​​the hollow cone, it is connected to the ear seat on the outer side wall of the annular oil bag. The lower end of the wire is connected to the wire retracting and releasing unit. Pulling either end of the wire can make the wire move along the wire groove.

[0018] Further, the wire-retracting and -releasing unit comprises a retracting fixture, a spring and a spring placement compartment;

[0019] The retractable clamp comprises a deformable clamping piece, an upper end with a wire clamping hole and a main telescopic rod. The upper end with the wire clamping hole forms a certain angle with the main telescopic rod so that the main telescopic rod is in a state perpendicular to the bottom cover after the overall assembly is in place; the deformable clamping piece is used to limit the upper end with the wire clamping hole in the wire placement groove of the wire storage unit, and can also ensure that the upper end with the wire clamping hole can slide in the wire placement groove under the action of external force; the upper end with the wire clamping hole is connected to the lower end of the wire in the wire placement groove through its wire clamping hole; the main telescopic rod can be stretched to become longer and contracted to become shorter under the action of external force; the lower end of the main telescopic rod is used to be fixedly connected with the torque end of the spring;

[0020] The clockwork spring is arranged in a spring placement compartment, and the spring placement compartment is arranged in a bottom cover; a mounting column for mounting the clockwork spring is arranged in the spring placement compartment, and a polygonal through hole is opened on the side wall of the spring placement compartment; the fixed end of the clockwork spring is located at the center of the clockwork spring and is fixedly connected to the mounting column, and the torque end of the clockwork spring is located on the outside of the clockwork spring and extends out of the polygonal through hole to be connected to the lower end of the main telescopic rod of the contraction clamp.

[0021] Furthermore, the bottom of the spring placement compartment is connected to the bottom cover via a concave-convex structure.

[0022] Furthermore, the deformable clamping member includes an X-shaped clamp and a torsion spring, wherein the X-shaped clamp is composed of a hinged first rod and a second rod, and two torsion arms of the torsion spring are respectively connected to the middle and upper parts of the first rod and the second rod; when the lower parts of the first rod and the second rod are grasped and brought close to each other, the lateral size of the X-shaped clamp becomes smaller so that it can be loaded into the wire placement groove of the wire storage unit; when the lower parts of the first rod and the second rod are released, the first rod and the second rod will return to the initial state under the action of the torsion spring, so that the lateral size of the X-shaped clamp becomes larger and is stuck in the wire placement groove and cannot be removed;

[0023] The upper end of the shrinkage clamp is provided with a mounting groove for accommodating the X-shaped clamp, and the upper end of the shrinkage clamp, the first rod and the second rod of the X-shaped clamp are connected together through pins.

[0024] Furthermore, balls are installed on the first rod and the second rod of the X-shaped fixture in the areas contacting the wire placement groove.

[0025] Furthermore, the oil filling and discharging assembly includes an oil storage tank cover, an oil storage tank body, a pump, a first inner conduit, a flow valve, a second inner conduit, a solenoid valve and an outer conduit connected in sequence; the oil storage tank cover is arranged at the upper end of the oil storage tank body and is statically sealed by a sealing ring to form a sealed oil storage tank, in which heat-conducting insulating oil is stored; an oil inlet and outlet are opened below the pump shell; the pump, the first inner conduit, the flow valve, the solenoid valve and the second inner conduit are located within the oil storage tank body, and the outer conduit is located outside the oil storage tank body, and the outer conduit passes through the protective shell and is connected and communicated with the oil filling and discharging hole at the upper end of the annular oil bag; a dynamic seal is adopted between the outer conduit and the oil filling and discharging hole, so that the outer conduit can rotate with the annular oil bag while ensuring the sealing of the annular oil bag.

[0026] The present invention also provides a method for adjusting the above-mentioned adjustable primary coil assembly, which is special in that it includes the following steps:

[0027] Step 1: After the underwater equipment is docked with the underwater charging base station, the control module controls the oil filling and discharging assembly to fill the annular oil bag with thermal conductive insulating oil to expand the annular oil bag until its diameter matches the diameter of the secondary coil carried by the underwater equipment;

[0028] Step 2: The control module controls the winding unit to work, so that the wire is continuously drawn out from the wire storage unit and wound around the annular oil bag until the number of turns of the wound primary coil matches the secondary coil carried by the underwater equipment. At this time, the primary coil is obtained, and then the wound primary coil is kept in a stable state through the self-locking of the motor in the winding unit during charging;

[0029] Step 3: After charging is completed, the control module controls the winding unit to work, so that the wire wound outside the annular oil bag is unwound and detached. At the same time, the wire detached from the annular oil bag is recovered by the wire retracting and releasing unit into the wire storage unit;

[0030] Step 4: The control module controls the oil filling and discharging assembly to extract the thermal insulating oil from the annular oil bag to restore the annular oil bag to its initial state.

[0031] The present invention also provides a wireless power transmitting device, which is special in that it includes a primary coil assembly and a primary circuit; the primary coil assembly adopts the above-mentioned adjustable primary coil assembly; the primary circuit adopts a primary circuit with adjustable compensation parameters; the primary circuit with adjustable compensation parameters includes a variable capacitor and a variable inductor, and the variable capacitor and the variable inductor are used to adjust the compensation parameters so that the primary coil in the adjustable primary coil assembly is in a resonant state.

[0032] The present invention also provides a method for adjusting the above-mentioned wireless power transmitting device, which is special in that it comprises the following steps:

[0033] Step 1, the control module controls the oil filling and discharging assembly to fill the annular oil bag with heat-conducting insulating oil so that the diameter of the annular oil bag matches the diameter of the secondary coil;

[0034] Step 2, the control module calculates the number of turns of the primary coil that needs to be wound according to the diameter and number of turns of the secondary coil carried by the underwater equipment and the current diameter of the annular oil bag;

[0035] Step 3, the control module calculates the number of turns that the output shaft of the motor in the winding unit needs to rotate according to the number of turns of the primary coil that needs to be wound, the current diameter of the annular oil bag, and the number of turns of the primary coil that can be wound by the output shaft of the motor in the winding unit rotating one circle, and controls the start and stop of the motor based on the number of turns that the output shaft of the motor needs to rotate;

[0036] Step 4, the control module obtains the resonant frequency of the secondary coil carried by the underwater equipment, and adjusts the output frequency of the primary inverter in the primary circuit with adjustable compensation parameters to the resonant frequency of the secondary coil;

[0037] Step 5, the control module detects the zero-crossing points of the output current and the output voltage of the primary inverter in the primary circuit with adjustable compensation parameters, and calculates the phase difference between the output current and the output voltage of the primary inverter based on the detected zero-crossing points of the output current and the output voltage of the primary inverter;

[0038] Step 6: The control module adjusts the variable capacitor and the variable inductor in the primary circuit with adjustable compensation parameters based on the phase difference between the output current and the output voltage of the primary inverter until the wireless power transmitting device is in a resonant state.

[0039] The advantages of the present invention are:

[0040] 1. The adjustable primary coil assembly of the present invention can adjust the diameter, number of turns and density of the primary coil, so that it can match the secondary coils of different specifications carried on different types of underwater equipment to form a coupler that adapts to the charging needs of different types of underwater equipment. Therefore, after adopting the adjustable primary coil assembly of the present invention, the function of carrying primary coils of different specifications on the same underwater charging base station can be realized, which greatly improves the utilization rate of the underwater charging base station and reduces the maintenance cost of the underwater charging base station.

[0041] 2. The adjustable primary coil assembly of the present invention can adjust the diameter of the primary coil by controlling the oil filling amount of the annular oil bag, and can adjust the density and number of turns of the primary coil by controlling the motor speed and the rising height of the annular oil bag. There is no adjustment gear limit and the adjustment is flexible.

[0042] 3. The annular oil bag in the adjustable primary coil assembly of the present invention has a heat conduction function, which can conduct the heat generated by the primary coil to the external seawater through the protective shell, thereby improving the working reliability of the primary coil.

[0043] 4. The wireless power transmitting device of the present invention includes the adjustable primary coil assembly of the present invention and an improved primary circuit with adjustable compensation parameters, has the function of adjustable power of electric energy transmission, and can be adapted to secondary coils of different specifications.

[0044] 5. The adjustable primary coil assembly and wireless power transmitter in the present invention can be sold separately to meet the usage requirements of different scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic diagram of a certain type of underwater vehicle about to dock and charge with an underwater charging base station.

[0046] Figure 2 This is the schematic diagram of the underwater wireless charging device.

[0047] Figure 3 It is a schematic diagram of the overall assembly of the adjustable primary coil assembly of the present invention.

[0048] Figure 4 It is a cross-sectional view of the adjustable primary coil assembly of the present invention (the spring is hidden in the figure).

[0049] Figure 5 yes Figure 4 A partial enlarged view of the annular oil bag, annular ferrite core and the output shaft of the motor.

[0050] Figure 6 It is a schematic structural diagram of the annular oil bag in the adjustable primary coil assembly of the present invention.

[0051] Figure 7 It is a schematic diagram of the positional relationship between the wire storage unit and the first half shell in the adjustable primary coil assembly of the present invention.

[0052] Figure 8 It is a structural schematic diagram of a shrinkage fixture in the adjustable primary coil assembly of the present invention.

[0053] Fig. 9 yes Figure 8 Magnified view of the upper part of the shrink fixture.

[0054] Fig.10 The figure is a schematic diagram of the connection relationship between the shrinking fixture (only the main telescopic rod part of the shrinking fixture is drawn in the figure) and the clockwork spring in the adjustable primary coil assembly of the present invention.

[0055] Fig.11It is a schematic diagram of the positional relationship between the base and the spring placement compartment in the adjustable primary coil assembly of the present invention.

[0056] Fig.12 It is a structural schematic diagram of a spring placement compartment in the adjustable primary coil assembly of the present invention.

[0057] Fig.13 It is a schematic diagram of the storage state of the wire in the adjustable primary coil assembly of the present invention.

[0058] Fig.14 It is a structural schematic diagram of the oil filling and discharging assembly in the adjustable primary coil assembly of the present invention.

[0059] Fig.15 It is a cross-sectional view of the oil filling and discharging assembly in the adjustable primary coil assembly of the present invention.

[0060] Fig.16 It is an example of a primary circuit with adjustable compensation parameters in the wireless power transmitting device of the present invention.

[0061] Description of reference numerals:

[0062] 1- Underwater charging base station;

[0063] 2- Underwater vehicles;

[0064] 31-primary coil; 32-primary circuit;

[0065] 41-secondary coil; 42-secondary circuit;

[0066] 5-protection shell; 51-pipeline hole;

[0067] 6-bottom cover; 61-protrusion; 62-plane spiral guide groove;

[0068] 7-wire storage unit; 71-hollow cone; 72-wire slot; 73-wire hole; 74-cylindrical surface;

[0069] 8-retractable wire unit; 81-contraction clamp; 811-deformable clamping piece; 8111-first rod; 8112-second rod; 8113-torsion spring; 812-cable clamping port; 813-upper end; 814-main telescopic rod; 815-installation slot; 82-spring spring; 83-spring placement compartment; 831-polygonal through hole; 832-installation column;

[0070] 9-winding unit; 91-motor; 92-stud; 93-threaded connection column; 94-annular oil bag; 941-ear seat; 942-oil filling and discharging hole; 95-bearing;

[0071] 10- oil filling and discharging assembly; 101- oil storage tank cover; 102- oil storage tank body; 103- pump; 104- first inner conduit; 105- flow valve; 106- second inner conduit; 107- solenoid valve; 108- second oil inlet and outlet; 109- outer conduit; 110- first oil inlet and outlet;

[0072] 11- Ring ferrite core. DETAILED DESCRIPTION

[0073] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0074] like Figure 3-15 As shown, the adjustable primary coil assembly provided by the present invention includes a protective shell 5, a bottom cover 6, a wire storage unit 7, a conductor, a wire retracting and releasing unit 8, a winding unit 9, an oil charging and discharging assembly 10, a control module (which can be achieved by existing conventional technical means, not shown in the figure) and an annular ferrite core 11.

[0075] The protective shell 5 is connected with the bottom cover 6 up and down to form a closed cavity for accommodating and protecting the wire storage unit 7, the wire retracting unit 8, the winding unit 9 and the annular ferrite core 11; the upper end of the protective shell 5 is provided with a pipeline hole 51. In order to facilitate assembly, Figure 3 , 7 As shown, the protective shell 5 is a shell formed by splicing a first half shell and a second half shell, with a closed upper end and an open lower end.

[0076] The wire storage unit 7 is used to store wires. Figure 4 , 7 As shown, the wire storage unit 7 includes a hollow cone 71 fixedly disposed in the protective shell 5, which is larger at the top and smaller at the bottom. The inner cavity of the hollow cone 71 is used to accommodate the annular ferrite core 11 and the winding unit 9. The outer surface of the hollow cone 71 is processed with a conical spiral line groove 72, and the upper part of the hollow cone 71 is processed with a wire hole 73 for connecting the wire groove 72 with the inner cavity of the hollow cone 71. Figure 7 As shown, the hollow cone 71 can be processed based on a solid cylinder by subtractive processing. After processing, the cylindrical surface 74 outside the hollow cone 71 can be used as the mounting surface with the protective shell 5, which makes it easier to fix the hollow cone 71 in the protective shell 5.

[0077] The wire is installed and limited in the wire groove 72 on the outer surface of the hollow cone 71. After being installed in place, the wire is in the shape of a conical spiral with a large top and a small bottom. Fig.13As shown; the upper end of the wire is led out from the wire hole 73 at the upper part of the hollow cone 71 to the internal cavity area of ​​the hollow cone 71, and then connected to the outer wall of the annular oil bag 94 in the winding unit 9, and the lower end of the wire is connected to the upper end 813 of the shrinking clamp 81 in the retractable wire unit 8; by pulling either end of the wire, the wire can be moved along the wire groove 72.

[0078] The wire-retracting and -releasing unit 8 is a spring-type wire-retracting and -releasing mechanism, which is used to assist the wire to be continuously drawn out from the wire-setting groove to realize wire-releasing when the upper end of the wire is pulled, and to pull the wire back into the wire-setting groove to realize automatic wire-retracting when the upper end of the wire is not pulled.

[0079] like Figure 4 , 8 As shown in FIG. 12 , the retractable wire unit 8 in this embodiment includes a retractable clamp 81 , a spring 82 and a spring placement compartment 83 .

[0080] The retractable clamp 81 includes a deformable clamping part 811, an upper end 813 with a wire clamping port 812, and a main telescopic rod 814. The upper end 813 with the wire clamping port 812 forms a certain angle with the main telescopic rod 814 so that the main telescopic rod 814 is in a state perpendicular to the bottom cover 6 after the overall assembly is in place; the deformable clamping part 811 is used to limit the upper end 813 with the wire clamping port 812 to be installed in the wire placement groove 72 of the wire storage unit 7, and can also ensure that the upper end 813 with the wire clamping port 812 can slide in the wire placement groove 72 under the action of external force; the upper end 813 with the wire clamping port 812 is connected to the lower end of the wire in the wire placement groove 72 through its wire clamping port 812; the main telescopic rod 814 can be stretched to become longer and contracted to become shorter under the action of external force; the lower end of the main telescopic rod 814 is used to be fixedly connected to the torque end of the clockwork spring 82. Specifically, as Fig. 9As shown, the deformable clamping member 811 in this embodiment includes an X-shaped clamp and a torsion spring 8113, the X-shaped clamp is composed of a hinged first rod 8111 and a second rod 8112, and the two torsion arms of the torsion spring 8113 are respectively connected to the middle and upper parts of the first rod 8111 and the second rod 8112; when the lower parts of the first rod 8111 and the second rod 8112 are grasped and brought close to each other, the lateral size of the X-shaped clamp will become smaller, so that the X-shaped clamp can be loaded into the wire storage groove 72 of the wire storage unit 7; when the lower parts of the first rod 8111 and the second rod 8112 are released, the first rod 8111 and the second rod 8112 will return to the initial state under the action of the torsion spring 8113, so that the lateral size of the X-shaped clamp becomes larger, so that it is stuck in the wire storage groove 72 and cannot escape. Correspondingly, the upper end 813 of the shrinking fixture 81 is provided with a mounting groove 815 for accommodating the X-shaped fixture, and the upper end 813 of the shrinking fixture 81, the first rod 8111 of the X-shaped fixture, and the second rod 8112 can be connected together through a pin. Preferably, a ball bearing can be installed in the area of ​​the first rod 8111 and the second rod 8112 of the X-shaped fixture that contacts the wire groove 72, so that it moves more smoothly in the wire groove 72.

[0081] The spring 82 is arranged in the spring compartment 83, and the spring compartment 83 is fixedly installed in the bottom cover 6. The spring compartment 83 is provided with a mounting post 832 for mounting the spring 82, and a polygonal through hole 831 is provided on the side wall of the spring compartment 83; the fixed end of the spring 82 is located at the center of the spring 82 and is fixedly connected to the mounting post 832 in the spring compartment 83, and the torque end of the spring 82 is located at the outside of the spring 82 and extends from the polygonal through hole 831 on the side wall of the spring compartment 83 and then connected to the lower end of the main telescopic rod 814 of the shrinking fixture 81. In order to facilitate processing and assembly, the spring compartment 83 and the bottom cover 6 can be connected by a concave-convex structure. For example, a protrusion 61 can be provided at the center of the bottom surface of the bottom cover 6, and a groove (not shown in the figure) that is interference-fitted with the protrusion 61 is correspondingly provided at the bottom of the spring compartment 83, so that the spring compartment 83 and the bottom cover 6 are fixedly connected by the interference fit between the protrusion 61 and the groove.

[0082] The principle of the retractable wire unit 8 in this embodiment is:

[0083] When it is necessary to release the wire, pull the upper end of the wire, and the lower end of the wire pulls the upper end 813 of the shrinking clamp 81 to slide upward along the wire placement groove 72 to gradually stretch and lengthen the main telescopic rod 814. At the same time, the main telescopic rod 814 continuously rotates around the axis of the wire placement groove 72, so that the wire can be continuously pulled out of the wire placement groove 72, and, as the shrinking clamp 81 moves, it will gradually tighten the clockwork spring 82, causing it to twist in its own plane and a part of it to gradually be pulled out of the spring placement compartment 83.

[0084] When it is necessary to reel in the wire, the upper end of the wire is no longer pulled. At this time, the clockwork spring 82 gradually recovers from the tensioned state to the initial state. During this period, the part of the clockwork spring 82 that is pulled out of the spring placement chamber 83 will gradually be recovered into the spring placement chamber 83 and drive the retracting clamp 81 to continuously rotate around the axis of the wire placement groove 72 (the rotation direction is opposite to the rotation direction when the wire is released), so that the upper end 813 of the retracting clamp 81 slides downward along the wire placement groove 72 and the main telescopic rod 814 shrinks and shortens, thereby continuously pulling the wire to move downward along the wire placement groove 72 to achieve the recovery of the wire.

[0085] Since the part of the clockwork spring 82 that is pulled out of the spring placement compartment 83 moves inside the bottom cover 6 during the process of winding and releasing the wire, in order to make the process of winding and releasing the wire more stable, the present invention can also process a planar spiral guide groove 62 on the inner bottom surface of the bottom cover 6 to provide movement guidance for the clockwork spring 82.

[0086] like Figure 4-6 As shown, the winding unit 9 includes a motor 91 , a stud 92 , a threaded connection column 93 and an annular oil bag 94 . The motor 91 is fixedly installed in the internal cavity of the hollow cone 71 in the wire storage unit 7, and the output shaft of the motor 91 is axially connected to the lower end of the stud 92 to drive the stud 92 to rotate; the threaded connection column 93 is sleeved in the annular oil bag 94 and fixedly connected to it; the stud 92 is sleeved in the threaded connection column 93 and is threadedly connected to it; the upper part of the stud 92 is supported on the protective shell 5 by a bearing 95; the annular oil bag 94 is made of elastic material, and an ear seat 941 is provided on its outer wall for connecting one end of the wire to the outer wall of the annular oil bag 94; the wire can be bound to the ear seat 941, or after the wire passes through the ear seat 941, it can be fixed to the ear seat 941 by connecting an anti-detachment buckle at the end of the wire to prevent the wire from detaching from the ear seat 941; considering the expansion effect of the annular oil bag 94, the ear seat 941 can be made of the same material as the annular oil bag, and can be integrally processed and formed with the annular oil bag 94. The upper end of the annular oil bag 94 is also provided with an oil filling and discharging hole 942 .

[0087] The working principle and process of the winding unit 9 are:

[0088] In the initial state, a certain amount of heat-conducting insulating oil has been pre-installed in the annular oil bag 94 to balance the internal and external pressures; before winding the primary coil, it is necessary to first fill a certain amount of heat-conducting insulating oil into the annular oil bag 94 through the oil filling and discharging component 10 according to the size of the secondary coil carried by the underwater equipment to be charged, so that the diameter of the annular oil bag 94 (the size of the annular oil bag 94 determines the diameter of the primary coil formed by winding) matches the diameter of the secondary coil; usually, considering the docking deviation between the underwater equipment and the underwater charging base station, the diameter of the primary coil should be larger than the diameter of the secondary coil, and the specific size can be calculated by existing conventional technical means.

[0089] After the annular oil bag 94 is filled with oil, the control module controls the motor 91 to operate; when the motor 91 operates, it drives the stud 92 to rotate, and the stud 92 drives the threaded connection column 93 to rotate and move up / down, thereby driving the annular oil bag 94 sleeved outside the threaded connection column 93 to rotate and move up / down.

[0090] When the annular oil bag 94 rotates and moves upward, the wire is pulled and gradually drawn out of the wire groove 72 of the wire storage unit 7 and wound on the outer wall of the annular oil bag 94 to form a primary coil; after winding in place, the motor 91 is self-locking controlled to keep the current number of turns unchanged during charging; when winding, the density of the primary coil can be adjusted by adjusting the speed of the motor 91. The faster the speed of the motor 91, the denser the wound primary coil; the number of turns of the primary coil can be adjusted by adjusting the axial stroke of the annular oil bag 94. In addition, since the annular oil bag 94 is filled with heat-conducting insulating oil, the heat generated by the primary coil during operation can be conducted to the seawater through the protective shell 5, thereby improving the working reliability of the primary coil.

[0091] On the contrary, when it is necessary to retract the wire, the motor 91 drives the annular oil bag 94 to move downward, and the wire is rewound and detached from the annular oil bag 94. At the same time, under the action of the spring spring 82 in the wire retracting unit 8, the wire is pulled down and recovered into the wire storage groove 72 of the wire storage unit 7.

[0092] The oil filling and discharging assembly 10 is used to fill the annular oil bag 94 with heat-conducting insulating oil, and to extract a certain amount of heat-conducting insulating oil from the annular oil bag 94 and reflux and store it, so that the annular oil bag 94 returns to its original state.

[0093] like Figure 4 , 14-15, the oil filling and discharging assembly 10 is arranged below the bottom cover 6, including an oil storage tank cover 101, an oil storage tank body 102, a pump 103, a first inner conduit 104, a flow valve 105, a second inner conduit 106, a solenoid valve 107 and an outer conduit 109 connected in sequence. The oil storage tank cover 101 is arranged at the upper end of the oil storage tank body 102 and is statically sealed by a sealing ring to form a sealed oil storage tank, in which heat-conducting insulating oil is stored; a first oil inlet and outlet 110 is opened below the shell of the pump 103; the pump 103, the first inner conduit 104, the flow valve 105, the solenoid valve 107 and the second inner conduit 106 are located in the oil storage tank body 102, and the outer conduit 109 is located outside the oil storage tank body 102, one end of the outer conduit 109 is connected and communicated with the second oil inlet and outlet 108 on the oil storage tank body 102, and the other end of the outer conduit 109 passes through the pipeline hole 51 on the protective shell 5 and communicates with the oil charging and discharging hole 942 at the upper end of the annular oil bag 94; and a dynamic seal is adopted between the outer conduit 109 and the oil charging and discharging hole 942 of the annular oil bag 94, so that the outer conduit 109 can rotate with the annular oil bag 94 while ensuring the sealing of the annular oil bag 94.

[0094] The control module is used to control the operation of the pump 103 , the flow valve 105 and the solenoid valve 107 in the oil filling and discharging assembly 10 , and is used to control the operation of the motor 91 in the winding unit 9 .

[0095] Before filling with oil, the control module first determines the diameter of the annular oil bag that matches the secondary coil based on the diameter of the secondary coil carried by the underwater equipment and the docking deviation between the underwater equipment and the underwater charging base station; during oil filling, when the control module detects that the diameter of the annular oil bag 94 matches the secondary coil, it indicates that the oil filling amount meets the requirement. At this time, the control module closes the pump 103 and the solenoid valve 107 in the oil filling and discharging assembly 10 to stop filling with oil.

[0096] After the oil filling is completed and before the primary coil is wound, the control module calculates the number of turns of the primary coil that needs to be wound based on the diameter and number of turns of the secondary coil carried on the underwater equipment and the current diameter of the annular oil bag, and then calculates the number of turns that the output shaft of the motor 91 in the winding unit needs to run, and controls the start and stop of the motor 91 based on the number of turns.

[0097] The annular ferrite core 11 is sleeved outside the stud 92 and located between the annular oil bag 94 and the motor 91, and is used to concentrate the magnetic field inside the primary coil, reduce leakage magnetic loss, and enhance the magnetic permeability of the magnetic circuit.

[0098] The working principle and adjustment method of the adjustable primary coil assembly of the present invention are:

[0099] When the underwater equipment needs to be charged and is docked with the underwater charging base station, the control module first controls the oil filling and discharging assembly 10 to fill the annular oil bag 94 with heat-conducting insulating oil to expand the annular oil bag 94 to a diameter that matches the diameter of the secondary coil carried by the underwater equipment;

[0100] After the oil filling is completed, the control module controls the motor 91 in the winding unit 9 to drive the annular oil bag 94 to move upward while rotating, so that the wire is continuously drawn out from the wire storage groove 72 of the wire storage unit 7 and wound around the outside of the annular oil bag 94 to form a primary coil; as the wire is continuously wound, the number of turns of the primary coil gradually increases. When the number of turns of the primary coil matches the number of turns of the secondary coil carried on the underwater equipment, the control module controls the motor 91 to stop rotating and remain in a self-locking state, so that the wound primary coil remains in a stable state during charging.

[0101] When the underwater equipment is charged, the control module starts the motor 91 first, and the motor 91 drives the annular oil bag 94 to move downward while rotating, so that the wire wound outside the annular oil bag 94 is unwound from the annular oil bag 94; at the same time, the wire that has been separated from the annular oil bag 94 is automatically retracted into the wire groove 72 of the wire storage unit 7 under the action of the spring spring 82 and the shrinking clamp 81 in the wire retracting unit 8; after completing the rewinding, the control unit controls the oil filling and discharging assembly 10 in the winding unit 9 to continuously extract the thermal conductive insulating oil from the annular oil bag 94 until the annular oil bag 94 returns to its initial state. Specifically, before extracting the thermal conductive insulating oil from the annular oil bag 94, the control module can determine the oil extraction flow rate and oil extraction time required for oil extraction based on the oil filling flow rate and oil filling time before winding the primary coil, so as to extract the corresponding thermal conductive insulating oil from the annular oil bag 94, so as to achieve the purpose of satisfying the annular oil bag 94 to return to its initial state after oil extraction.

[0102] In addition to the above-mentioned adjustable primary coil assembly, the present invention also provides a wireless power transmitting device with adjustable electric energy transmission power, including a primary coil assembly and a primary circuit, the primary coil in the primary coil assembly is connected to the primary circuit to be connected to the loop of the primary circuit; the primary coil assembly is the adjustable primary coil assembly provided by the present invention; since the primary coil parameters in the adjustable primary coil assembly will be adjusted according to the parameters of the secondary coil carried on the underwater equipment, the primary circuit needs to adopt a primary circuit with adjustable compensation parameters to maintain the resonant state of the primary coil, so that the electric energy transmission efficiency is optimized.

[0103] like Fig.16 As shown, taking the commonly used LCC resonant topology of the primary circuit as an example, by using a variable inductor to replace the original fixed inductor as the compensation inductor, and using a variable capacitor to replace the original fixed capacitor as the primary parallel compensation capacitor, the original primary circuit with fixed compensation parameters can be improved to a primary circuit with adjustable compensation parameters. Assuming the resonant frequency is , the resonance condition is as follows:

[0104]

[0105] When the primary coil becomes larger, the inductance of the primary coil Increase the inductance of the variable inductor to maintain resonance Need to increase the capacitance value of the variable capacitor The inductance value of the variable inductor needs to be reduced. and the capacitance value of the variable capacitor The specific value of the adjustment can be calculated using the above resonance conditions.

[0106] For the primary circuit using other types of resonant topologies, the method of improving it into a primary circuit with adjustable compensation parameters is similar to the principle of the primary circuit of the above-mentioned LCC resonant topology, which will not be repeated here.

[0107] The adjustment method of the wireless power transmitting device with adjustable power transmission provided by the present invention is:

[0108] Step 1: The control module controls the oil filling and discharging assembly 10 to fill the annular oil bag 94 with heat-conducting insulating oil so that the diameter of the annular oil bag 94 matches the diameter of the secondary coil carried by the underwater equipment;

[0109] Step 2, the control module calculates the number of turns of the primary coil that needs to be wound according to the diameter and number of turns of the secondary coil carried by the underwater equipment and the current diameter of the annular oil bag 94;

[0110] Step 3, the control module calculates the number of turns that the output shaft of the motor 91 needs to run according to the number of turns of the primary coil that needs to be wound, the current diameter of the annular oil bag 94, and the number of turns of the primary coil that can be wound when the output shaft of the motor 91 runs one circle, and controls the start and stop of the motor 91 based on the number of turns that the output shaft of the motor 91 needs to run;

[0111] Step 4, the control module obtains the resonant frequency of the secondary coil carried by the underwater equipment, and adjusts the output frequency of the primary inverter in the primary circuit with adjustable compensation parameters to the resonant frequency of the secondary coil;

[0112] Step 5, the control module detects the zero-crossing points of the output current and the output voltage of the primary inverter in the primary circuit with adjustable compensation parameters, and calculates the phase difference between the output current and the output voltage of the primary inverter based on the detected zero-crossing points of the output current and the output voltage of the primary inverter;

[0113] Step 6: The control module adjusts the variable capacitor and the variable inductor in the primary circuit with adjustable compensation parameters based on the phase difference between the output current and the output voltage of the primary inverter until the wireless power transmitting device is in a resonant state.

[0114] In the above step 1, when the diameter of the annular oil bag 94 is larger than the diameter of the secondary coil, it is considered that the diameter of the annular oil bag 94 matches the diameter of the secondary coil; how much larger the diameter of the annular oil bag 94 is than the diameter of the secondary coil can be determined based on the docking deviation between the underwater equipment and the underwater charging base station.

[0115] The diameter monitoring of the annular oil bag 94 can be carried out by establishing the relationship between the diameter of the annular oil bag 94 and the oil filling amount through simulation in advance, and then the diameter of the annular oil bag 94 can be obtained by calculating the oil filling amount in real time during the oil filling process.

Claims

1. Adjustable primary coil assembly, characterized by: It includes a protective shell, a bottom cover, a wire storage unit, a conductor, a wire retracting and releasing unit, a winding unit, an oil charging and discharging assembly, a control module and a ring-shaped ferrite core; The protective shell and the bottom cover are connected up and down to form a closed cavity for accommodating and protecting the wire storage unit, the wire retracting and releasing unit, the winding unit and the ferrite core; The wire storage unit is used for storing wires; The upper end of the wire extends out of the wire storage unit and is connected to the winding unit, and the lower end of the wire is connected to the wire retracting and releasing unit; The wire-retracting and -releasing unit is a spring-type wire-retracting and -releasing mechanism, which is used to assist the wire to be continuously drawn out from the wire storage unit to realize wire release when the upper end of the wire is pulled, and to pull the wire back into the wire storage unit to realize automatic wire retraction when the upper end of the wire is not pulled; The winding unit includes a motor, a stud, a threaded connection column and an annular oil bag; the output shaft of the motor is axially connected to the lower end of the stud; the threaded connection column is sleeved in the annular oil bag and fixedly connected to it; the stud is sleeved in the threaded connection column and thread-matched with it; the upper part of the stud is supported on the protective housing through a bearing; the annular oil bag is made of elastic material, and an ear seat is provided on its outer wall; the upper end of the wire is connected to the ear seat; in the initial state, the annular oil bag is pre-set with heat-conducting insulating oil to balance the internal and external pressures; The motor drives the stud to rotate, and the stud drives the threaded connection column to rotate and move up / down, thereby driving the annular oil bag to rotate and move up / down; when the annular oil bag rotates and moves up, the wire is pulled out of the wire storage unit and wound around the annular oil bag to form a primary coil; when the annular oil bag rotates and moves down, the wire is detached from the annular oil bag and recovered into the wire storage unit; The oil filling and discharging assembly is used to fill the annular oil bag with heat-conducting insulating oil so that the diameter of the annular oil bag matches the diameter of the secondary coil, and to extract the heat-conducting insulating oil in the annular oil bag and return it for storage, so that the annular oil bag returns to its initial state; The control module is used to control the winding unit and the oil charging and discharging assembly to work according to the structural parameters of the secondary coil, so as to ensure that the primary coil formed finally matches the secondary coil; The annular ferrite core is sleeved outside the stud and located between the annular oil bag and the motor, and is used to concentrate the magnetic field inside the primary coil, reduce leakage magnetic loss, and enhance the magnetic permeability of the magnetic circuit.

2. The adjustable primary coil assembly according to claim 1, characterized in that: The wire storage unit includes a hollow cone that is larger at the top and smaller at the bottom and is fixed in a protective shell. The internal cavity of the hollow cone is used to accommodate the winding unit. A conical spiral wire groove is processed on the outer surface of the hollow cone. A wire hole for connecting the wire groove with the internal cavity of the hollow cone is processed on the upper part of the hollow cone. The wire is installed and limited in the wire groove. After the upper end of the wire is led out from the wire hole to the internal cavity area of ​​the hollow cone, it is connected to the ear seat on the outer side wall of the annular oil bag. The lower end of the wire is connected to the wire retracting and releasing unit. Pulling either end of the wire can make the wire move along the wire groove.

3. The adjustable primary coil assembly according to claim 2, characterized in that: The wire-retracting and paying-off unit includes a retracting fixture, a spring and a spring placement compartment; The retractable clamp comprises a deformable clamping piece, an upper end with a wire clamping hole and a main telescopic rod. The upper end with the wire clamping hole forms a certain angle with the main telescopic rod so that the main telescopic rod is in a state perpendicular to the bottom cover after the overall assembly is in place; the deformable clamping piece is used to limit the upper end with the wire clamping hole in the wire placement groove of the wire storage unit, and can also ensure that the upper end with the wire clamping hole can slide in the wire placement groove under the action of external force; the upper end with the wire clamping hole is connected to the lower end of the wire in the wire placement groove through its wire clamping hole; the main telescopic rod can be stretched to become longer and contracted to become shorter under the action of external force; the lower end of the main telescopic rod is used to be fixedly connected with the torque end of the spring; The clockwork spring is arranged in a spring placement compartment, and the spring placement compartment is arranged in a bottom cover; a mounting column for mounting the clockwork spring is arranged in the spring placement compartment, and a polygonal through hole is opened on the side wall of the spring placement compartment; the fixed end of the clockwork spring is located at the center of the clockwork spring and is fixedly connected to the mounting column, and the torque end of the clockwork spring is located on the outside of the clockwork spring and extends out of the polygonal through hole to be connected to the lower end of the main telescopic rod of the contraction clamp.

4. The adjustable primary coil assembly according to claim 3, characterized in that: The bottom of the spring placement compartment is connected with the bottom cover through a concave-convex structure.

5. The adjustable primary coil assembly according to claim 4, characterized in that: The deformable clamping member includes an X-shaped clamp and a torsion spring. The X-shaped clamp is composed of a hinged first rod and a second rod. Two torsion arms of the torsion spring are respectively connected to the middle and upper parts of the first rod and the second rod. When the lower parts of the first rod and the second rod are grasped to make the lower parts of the first rod and the second rod close to each other, the lateral size of the X-shaped clamp becomes smaller so that it can be loaded into the wire placement groove of the wire storage unit. When the lower parts of the first rod and the second rod are released, the first rod and the second rod will return to the initial state under the action of the torsion spring, so that the lateral size of the X-shaped clamp becomes larger and is stuck in the wire placement groove and cannot be removed. The upper end of the shrinkage clamp is provided with a mounting groove for accommodating the X-shaped clamp, and the upper end of the shrinkage clamp, the first rod and the second rod of the X-shaped clamp are connected together through pins.

6. The adjustable primary coil assembly according to claim 5, characterized in that: Ball bearings are installed on the areas of the first rod and the second rod of the X-shaped clamp that are in contact with the wire placement groove.

7. The adjustable primary coil assembly according to any one of claims 1 to 6, characterized in that: The oil filling and discharging assembly comprises an oil storage tank cover, an oil storage tank body, a pump, a first inner conduit, a flow valve, a second inner conduit, a solenoid valve and an outer conduit which are connected in sequence; the oil storage tank cover is arranged at the upper end of the oil storage tank body and is statically sealed by a sealing ring to form a sealed oil storage tank, in which heat-conducting insulating oil is stored; an oil inlet and outlet are provided below the pump housing; the pump, the first inner conduit, the flow valve, the solenoid valve and the second inner conduit are located within the oil storage tank body, and the outer conduit is located outside the oil storage tank body, and the outer conduit passes through the protective housing and is connected and communicated with the oil filling and discharging hole at the upper end of the annular oil bag; a dynamic seal is adopted between the outer conduit and the oil filling and discharging hole, so that the outer conduit can rotate with the annular oil bag while ensuring the sealing of the annular oil bag.

8. The method for adjusting the adjustable primary coil assembly according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: After the underwater equipment is docked with the underwater charging base station, the control module controls the oil filling and discharging assembly to fill the annular oil bag with thermal conductive insulating oil to expand the annular oil bag until its diameter matches the diameter of the secondary coil carried by the underwater equipment; Step 2: The control module controls the winding unit to work, so that the wire is continuously drawn out from the wire storage unit and wound around the annular oil bag until the number of turns of the wound primary coil matches the secondary coil carried by the underwater equipment. At this time, the primary coil is obtained, and then the wound primary coil is kept in a stable state through the self-locking of the motor in the winding unit during charging; Step 3: After charging is completed, the control module controls the winding unit to work, so that the wire wound outside the annular oil bag is unwound and detached. At the same time, the wire detached from the annular oil bag is recovered by the wire retracting and releasing unit into the wire storage unit; Step 4: The control module controls the oil filling and discharging assembly to extract the thermal insulating oil from the annular oil bag to restore the annular oil bag to its initial state.

9. A wireless power transmitting device, characterized in that: It comprises a primary coil assembly and a primary circuit; the primary coil assembly adopts the adjustable primary coil assembly described in any one of claims 1-7; the primary circuit adopts a primary circuit with adjustable compensation parameters; the primary circuit with adjustable compensation parameters comprises a variable capacitor and a variable inductor, and the variable capacitor and the variable inductor are used to adjust the compensation parameters so that the primary coil in the adjustable primary coil assembly is in a resonant state.

10. The method for adjusting the wireless power transmitting device according to claim 9, characterized in that: The following steps are involved: Step 1, the control module controls the oil filling and discharging assembly to fill the annular oil bag with heat-conducting insulating oil so that the diameter of the annular oil bag matches the diameter of the secondary coil; Step 2, the control module calculates the number of turns of the primary coil that needs to be wound according to the diameter and number of turns of the secondary coil carried by the underwater equipment and the current diameter of the annular oil bag; Step 3, the control module calculates the number of turns that the output shaft of the motor in the winding unit needs to rotate according to the number of turns of the primary coil that needs to be wound, the current diameter of the annular oil bag, and the number of turns of the primary coil that can be wound by the output shaft of the motor in the winding unit rotating one circle, and controls the start and stop of the motor based on the number of turns that the output shaft of the motor needs to rotate; Step 4, the control module obtains the resonant frequency of the secondary coil carried by the underwater equipment, and adjusts the output frequency of the primary inverter in the primary circuit with adjustable compensation parameters to the resonant frequency of the secondary coil; Step 5, the control module detects the zero-crossing points of the output current and the output voltage of the primary inverter in the primary circuit with adjustable compensation parameters, and calculates the phase difference between the output current and the output voltage of the primary inverter based on the detected zero-crossing points of the output current and the output voltage of the primary inverter; Step 6: The control module adjusts the variable capacitor and the variable inductor in the primary circuit with adjustable compensation parameters based on the phase difference between the output current and the output voltage of the primary inverter until the wireless power transmitting device is in a resonant state.

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